terminal-chess: src/game.c@e0a76ee1bb2b

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  *

     4  * Copyright 2014 Mike Becker. All rights reserved.

     5  *

     6  * Redistribution and use in source and binary forms, with or without

     7  * modification, are permitted provided that the following conditions are met:

     8  *

     9  *   1. Redistributions of source code must retain the above copyright

    10  *      notice, this list of conditions and the following disclaimer.

    11  *

    12  *   2. Redistributions in binary form must reproduce the above copyright

    13  *      notice, this list of conditions and the following disclaimer in the

    14  *      documentation and/or other materials provided with the distribution.

    15  *

    16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

    20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    26  * POSSIBILITY OF SUCH DAMAGE.

    27  *

    28  */

    30 #include "game.h"

    31 #include "network.h"

    32 #include "input.h"

    33 #include <ncurses.h>

    34 #include <string.h>

    36 static const uint8_t boardx = 10, boardy = 10;

    38 static void draw_board(GameState *gamestate) {

    40     for (uint8_t y = 0 ; y < 8 ; y++) {

    41         for (uint8_t x = 0 ; x < 8 ; x++) {

    42             uint8_t col = gamestate->board[y][x] & COLOR_MASK;

    43             uint8_t piece = gamestate->board[y][x] & PIECE_MASK;

    44             char piecec;

    45             if (piece) {

    46                 piecec = piece == PAWN ? 'P' : getpiecechr(piece);

    47             } else {

    48                 piecec = ' ';

    49             }

    51             attrset((col == WHITE ? A_BOLD : A_DIM) |

    52                 COLOR_PAIR((y&1)==(x&1) ? COL_WB : COL_BW));

    54             int cy = gamestate->mycolor == WHITE ? boardy-y : boardy-7+y;

    55             int cx = gamestate->mycolor == WHITE ? boardx+x*3 : boardx+21-x*3;

    56             mvaddch(cy, cx, ' ');

    57             mvaddch(cy, cx+1, piecec);

    58             mvaddch(cy, cx+2, ' ');

    59         }

    60     }

    62     attrset(A_NORMAL);

    63     for (uint8_t i = 0 ; i < 8 ; i++) {

    64         int x = gamestate->mycolor == WHITE ? boardx+i*3+1 : boardx+22-i*3;

    65         int y = gamestate->mycolor == WHITE ? boardy-i : boardy-7+i;

    66         mvaddch(boardy+1, x, 'a'+i);

    67         mvaddch(y, boardx-2, '1'+i);

    68     }

    70     /* move log */

    71     // TODO: introduce window to avoid bugs with a long move log

    72     uint8_t logy = 0;

    73     const uint8_t logx = boardx + 30;

    74     int logi = 1;

    75     MoveList *logelem = gamestate->movelist;

    77     while (logelem) {

    78         logi++;

    79         if (logi % 2 == 0) {

    80             if ((logi - 2) % 4 == 0) {

    81                 logy++;

    82                 move(logy, logx);

    83             }

    84             printw("%d. ", logi / 2);

    85         }

    87         if (logelem) {

    88             Move move = logelem->move;

    89             if ((move.piece&PIECE_MASK) == KING &&

    90                 abs(move.tofile-move.fromfile) == 2) {

    91                 addstr(move.tofile==fileidx('c')?"O-O-O":"O-O");

    92             } else {

    93                 char logstr[] = {

    94                     getpiecechr(move.piece),

    95                     filechr(move.fromfile), rowchr(move.fromrow),

    96                     move.capture ? 'x':'\0',

    97                     filechr(move.tofile), rowchr(move.torow),

    98                     move.check ? '+' : (move.checkmate ? '#' :

    99                         (move.promotion ? '=' : '\0')),

   100                     move.promotion ? getpiecechr(move.promotion) : '\0'

   101                 };

   102                 for (int stri = 0 ; stri < sizeof(logstr) ; stri++) {

   103                     if (logstr[stri]) {

   104                         addch(logstr[stri]);

   105                     }

   106                 }

   107             }

   108             addch(' ');

   110             logelem = logelem->next;

   111         }

   112     }

   113 }

   115 static void eval_move_failed_msg(int code) {

   116     switch (code) {

   117     case AMBIGUOUS_MOVE:

   118         printw("Ambiguous move - please specify the piece to move.");

   119         break;

   120     case INVALID_POSITION:

   121         printw("Cannot find the piece that shall be moved.");

   122         break;

   123     case NEED_PROMOTION:

   124         printw("You need to promote the pawn (append \"=Q\" e.g.)!");

   125         break;

   126     default:

   127         printw("Can't interpret move - please use algebraic notation.");

   128     }

   129 }

   131 static int domove_singlemachine(GameState *gamestate) {

   133     const size_t buflen = 8;

   134     char movestr[buflen];

   136     int inputy = getmaxy(stdscr) - 6;

   137     while (1) {

   138         move(inputy, 0);

   139         printw(

   140             "Use chess notation to enter your move.\n"

   141             "Or type 'surr' to surrender or 'remis' to end with remis.\n\n"

   142             "Type your move: ");

   143         clrtoeol();

   144         refresh();

   145         getnstr(movestr, buflen);

   147         if (strncmp(movestr, "surr", buflen) == 0) {

   148             printw("%s surrendered!",

   149                 gamestate->mycolor==WHITE?"White":"Black");

   150             clrtoeol();

   151             refresh();

   152             return 1;

   153         } else if (strncmp(movestr, "remis", buflen) == 0) {

   154             printw("Game ends remis.");

   155             clrtoeol();

   156             refresh();

   157             return 1;

   158         } else {

   159             Move move;

   160             int eval_result = eval_move(gamestate, movestr, &move);

   161             switch (eval_result) {

   162             case VALID_MOVE_SYNTAX:

   163                 if (validate_move(gamestate, &move)) {

   164                     apply_move(gamestate, &move);

   165                     if (move.checkmate) {

   166                         printw("Checkmate!");

   167                         clrtoeol();

   168                         return 1;

   169                     } else if (move.stalemate) {

   170                         printw("Stalemate!");

   171                         clrtoeol();

   172                         return 1;

   173                     } else {

   174                         return 0;

   175                     }

   176                 } else {

   177                     printw("Invalid move.");

   178                 }

   179                 break;

   180             default:

   181                 eval_move_failed_msg(eval_result);

   182             }

   183             clrtoeol();

   184         }

   185     }

   186 }

   188 static int sendmove(GameState *gamestate, int opponent) {

   190     const size_t buflen = 8;

   191     char movestr[buflen];

   192     _Bool remisrejected = FALSE;

   193     uint8_t code;

   195     int inputy = getmaxy(stdscr) - 6;

   196     while (1) {

   197         move(inputy, 0);

   198         if (remisrejected) {

   199             printw(

   200                 "Use chess notation to enter your move.\n"

   201                 "Remis offer rejected - type 'surr' to surrender.      \n\n"

   202                 "Type your move: ");

   203         } else {

   204             printw(

   205                 "Use chess notation to enter your move.\n"

   206                 "Or type 'surr' to surrender or 'remis' to offer remis.\n\n"

   207                 "Type your move: ");

   208         }

   209         clrtoeol();

   210         refresh();

   211         getnstr(movestr, buflen);

   213         if (strncmp(movestr, "surr", buflen) == 0) {

   214             printw("You surrendered!");

   215             clrtoeol();

   216             refresh();

   217             net_send_code(opponent, NETCODE_SURRENDER);

   218             return 1;

   219         } else if (strncmp(movestr, "remis", buflen) == 0) {

   220             if (!remisrejected) {

   221                 net_send_code(opponent, NETCODE_REMIS);

   222                 printw("Remis offer sent - waiting for acceptance...");

   223                 refresh();

   224                 if (net_recieve_code(opponent) == NETCODE_ACCEPT) {

   225                     printw("\rRemis accepted!");

   226                     clrtoeol();

   227                     refresh();

   228                     return 1;

   229                 } else {

   230                     remisrejected = TRUE;

   231                 }

   232             }

   233         } else {

   234             Move move;

   235             int eval_result = eval_move(gamestate, movestr, &move);

   236             switch (eval_result) {

   237             case VALID_MOVE_SYNTAX:

   238                 net_send_data(opponent, NETCODE_MOVE, &move, sizeof(Move));

   239                 code = net_recieve_code(opponent);

   240                 move.check = code == NETCODE_CHECK;

   241                 move.checkmate = code == NETCODE_CHECKMATE;

   242                 move.stalemate = code == NETCODE_STALEMATE;

   243                 if (code == NETCODE_DECLINE) {

   244                     printw("Invalid move.");

   245                 } else {

   246                     apply_move(gamestate, &move);

   247                     if (move.checkmate) {

   248                         printw("Checkmate!");

   249                         clrtoeol();

   250                         return 1;

   251                     } else if (move.stalemate) {

   252                         printw("Stalemate!");

   253                         clrtoeol();

   254                         return 1;

   255                     } else {

   256                         return 0;

   257                     }

   258                 }

   259                 break;

   260             default:

   261                 eval_move_failed_msg(eval_result);

   262             }

   263             clrtoeol();

   264         }

   265     }

   266 }

   268 static int recvmove(GameState *gamestate, int opponent) {

   270     int inputy = getmaxy(stdscr) - 6;

   271     while (1) {

   272         move(inputy, 0);

   273         printw("Awaiting opponent move...");

   274         clrtoeol();

   275         refresh();

   277         // TODO: nonblocking

   278         uint32_t code = net_recieve_code(opponent);

   280         Move move;

   281         switch (code) {

   282             case NETCODE_SURRENDER:

   283                 printw("\rYour opponent surrendered!");

   284                 clrtoeol();

   285                 return 1;

   286             case NETCODE_REMIS:

   287                 if (prompt_yesno(

   288                     "\rYour opponent offers remis - do you accept")) {

   289                     printw("\rRemis accepted!");

   290                     clrtoeol();

   291                     net_send_code(opponent, NETCODE_ACCEPT);

   292                     return 1;

   293                 } else {

   294                     net_send_code(opponent, NETCODE_DECLINE);

   295                 }

   296                 break;

   297             case NETCODE_MOVE:

   298                 net_recieve_data(opponent, &move, sizeof(Move));

   299                 if (validate_move(gamestate, &move)) {

   300                     apply_move(gamestate, &move);

   301                     if (move.check) {

   302                         net_send_code(opponent, NETCODE_CHECK);

   303                     } else if (move.checkmate) {

   304                         net_send_code(opponent, NETCODE_CHECKMATE);

   305                         printw("\rCheckmate!");

   306                         clrtoeol();

   307                         return 1;

   308                     } else if (move.stalemate) {

   309                         net_send_code(opponent, NETCODE_STALEMATE);

   310                         printw("\rStalemate!");

   311                         clrtoeol();

   312                         return 1;

   313                     } else {

   314                         net_send_code(opponent, NETCODE_ACCEPT);

   315                     }

   316                     return 0;

   317                 } else {

   318                     net_send_code(opponent, NETCODE_DECLINE);

   319                 }

   320         }

   321     }

   322 }

   324 static void init_board(GameState *gamestate) {

   325     Board initboard = {

   326         {WROOK, WKNIGHT, WBISHOP, WQUEEN, WKING, WBISHOP, WKNIGHT, WROOK},

   327         {WPAWN, WPAWN,   WPAWN,   WPAWN,  WPAWN, WPAWN,   WPAWN,   WPAWN},

   328         {0,     0,       0,       0,      0,     0,       0,       0},

   329         {0,     0,       0,       0,      0,     0,       0,       0},

   330         {0,     0,       0,       0,      0,     0,       0,       0},

   331         {0,     0,       0,       0,      0,     0,       0,       0},

   332         {BPAWN, BPAWN,   BPAWN,   BPAWN,  BPAWN, BPAWN,   BPAWN,   BPAWN},

   333         {BROOK, BKNIGHT, BBISHOP, BQUEEN, BKING, BBISHOP, BKNIGHT, BROOK}

   334     };

   335     memcpy(gamestate->board, initboard, sizeof(Board));

   336 }

   338 void game_start_singlemachine(Settings *settings) {

   339     GameState gamestate;

   340     init_board(&gamestate);

   341     gamestate.mycolor = WHITE;

   342     gamestate.movelist = gamestate.lastmove = NULL;

   343     // TODO: time limit

   344     _Bool running;

   345     do {

   346         clear();

   347         draw_board(&gamestate);

   348         running = !domove_singlemachine(&gamestate);

   349         gamestate.mycolor = opponent_color(gamestate.mycolor);

   350     }  while (running);

   352     gamestate_cleanup(&gamestate);

   354     mvaddstr(getmaxy(stdscr)-1, 0,

   355         "Game has ended. Press any key to leave...");

   356     refresh();

   357     getch();

   358 }

   360 void game_start(Settings *settings, int opponent) {

   361     _Bool myturn = is_server(settings) ==

   362         (settings->gameinfo.servercolor == WHITE);

   364     // TODO: time limit

   365     GameState gamestate;

   366     init_board(&gamestate);

   367     gamestate.mycolor = myturn ? WHITE:BLACK;

   368     gamestate.movelist = gamestate.lastmove = NULL;

   370     _Bool running;

   371     do {

   372         clear();

   373         draw_board(&gamestate);

   374         if (myturn) {

   375             running = !sendmove(&gamestate, opponent);

   376         } else {

   377             running = !recvmove(&gamestate, opponent);

   378             flushinp(); // flush any input the user hacked in while waiting

   379         }

   380         myturn ^= TRUE;

   381     }  while (running);

   383     gamestate_cleanup(&gamestate);

   385     mvaddstr(getmaxy(stdscr)-1, 0,

   386         "Game has ended. Press any key to leave...");

   387     refresh();

   388     getch();

   389 }

Mercurial > hg > terminal-chess / file revision

src/game.c@e0a76ee1bb2b

src/game.c